For the first time in 17 months, Robin Quivers returned to her spot in the studio on the Howard Stern show ... with Howard telling his BFF, "Never get sick again."As we previously reported, Quivers had been participating on the show from her home…

Robin Quivers -- Howard Stern's right hand woman -- just announced she's been battling cancer for the past year ... but says she's now cancer free. Quivers says ... her cancer developed from endometrial tissue, which is tissue in the uterus. Robin…